Table 3. Corn ear leaf weight affected by clover-tillage
management and N fertilizer. (Average of five ear leaves)
 Nitrogen level (kg/ha)
Management 0 67 134 201 268 Average
 ------------ Grams/5 leaves -----------
CT-forage 14.54 19.39 20.05 21.00 20.85 19.17 V

CT-Green manure 15.58 17.47 18.73 20.40 20.55 18.55 v

NT-Mulch 12.35 16.01 17.76 20.54 21.88 17.71 v

NT-Forage 11.22 15.22 18.30 20.15 19.50 16.88 v

Fallow 10.79 17.53 18.89 21.76 21.85 18.16 v

LSD=1.27
Average 12.90 d 17.12 c 18.75 b 20.77 a 20.93 a
CV=7.96%
CT-forage = Clover harvested for forage followed by conventional
tillage soil preparation. CT-Green manure = Clover turned under
with conventional tillage. NT-Forage = Clover harvested for forage
followed by direct seeding with in-row subsoil no-tillage planter.
NT-Mulch = Direct seeding in clover with in-row subsoil no-tillage
planter. Fallow = No winter cover crop, area kept clean tilled as
a control treatment. Values in rows within each management
treatment not followed by the same letter (a,b,c,d,e) are
significantly different at the 0.05 level of probability according
to LSD. Values in columns not followed by the same letter
(v,w,x,y,z) are significantly different according to Duncan's
multiple range test.


Corn ear leaf weight from tillage-
clover management and N fertilizer


0 50 100 150 200 250 300
 Nitrogen Applied in kg/ha
- CT Forage -- CT Green Manure NT Muloh
- NT Forage Fallow


Figure 2